diff --git a/tools/releasetools/edify_generator.py b/tools/releasetools/edify_generator.py
index 57f8cda..2ecc5cb 100644
--- a/tools/releasetools/edify_generator.py
+++ b/tools/releasetools/edify_generator.py
@@ -85,14 +85,17 @@
       raise ValueError("must specify the OEM value")
     if common.OPTIONS.oem_no_mount:
       cmd = ('getprop("{name}") == "{value}" || '
-             'abort("This package expects the value \\"{value}\\" for '
+             'abort("E{code}: This package expects the value \\"{value}\\" for '
              '\\"{name}\\"; this has value \\"" + '
-             'getprop("{name}") + "\\".");').format(name=name, value=value)
+             'getprop("{name}") + "\\".");').format(
+                 code=common.ErrorCode.OEM_PROP_MISMATCH,
+                 name=name, value=value)
     else:
       cmd = ('file_getprop("/oem/oem.prop", "{name}") == "{value}" || '
-             'abort("This package expects the value \\"{value}\\" for '
+             'abort("E{code}: This package expects the value \\"{value}\\" for '
              '\\"{name}\\" on the OEM partition; this has value \\"" + '
              'file_getprop("/oem/oem.prop", "{name}") + "\\".");').format(
+                 code=common.ErrorCode.OEM_PROP_MISMATCH,
                  name=name, value=value)
     self.script.append(cmd)
 
@@ -102,9 +105,9 @@
       raise ValueError("must specify some fingerprints")
     cmd = (' ||\n    '.join([('getprop("ro.build.fingerprint") == "%s"') % i
                              for i in fp]) +
-           ' ||\n    abort("Package expects build fingerprint of %s; this '
-           'device has " + getprop("ro.build.fingerprint") + ".");') % (
-               " or ".join(fp))
+           ' ||\n    abort("E%d: Package expects build fingerprint of %s; '
+           'this device has " + getprop("ro.build.fingerprint") + ".");') % (
+               common.ErrorCode.FINGERPRINT_MISMATCH, " or ".join(fp))
     self.script.append(cmd)
 
   def AssertSomeThumbprint(self, *fp):
@@ -113,9 +116,9 @@
       raise ValueError("must specify some thumbprints")
     cmd = (' ||\n    '.join([('getprop("ro.build.thumbprint") == "%s"') % i
                              for i in fp]) +
-           ' ||\n    abort("Package expects build thumbprint of %s; this '
+           ' ||\n    abort("E%d: Package expects build thumbprint of %s; this '
            'device has " + getprop("ro.build.thumbprint") + ".");') % (
-               " or ".join(fp))
+               common.ErrorCode.THUMBPRINT_MISMATCH, " or ".join(fp))
     self.script.append(cmd)
 
   def AssertOlderBuild(self, timestamp, timestamp_text):
@@ -123,16 +126,16 @@
     the given timestamp."""
     self.script.append(
         ('(!less_than_int(%s, getprop("ro.build.date.utc"))) || '
-         'abort("Can\'t install this package (%s) over newer '
+         'abort("E%d: Can\'t install this package (%s) over newer '
          'build (" + getprop("ro.build.date") + ").");') % (timestamp,
-                                                            timestamp_text))
+             common.ErrorCode.OLDER_BUILD, timestamp_text))
 
   def AssertDevice(self, device):
     """Assert that the device identifier is the given string."""
     cmd = ('getprop("ro.product.device") == "%s" || '
-           'abort("This package is for \\"%s\\" devices; '
+           'abort("E%d: This package is for \\"%s\\" devices; '
            'this is a \\"" + getprop("ro.product.device") + "\\".");') % (
-               device, device)
+               device, common.ErrorCode.DEVICE_MISMATCH, device)
     self.script.append(cmd)
 
   def AssertSomeBootloader(self, *bootloaders):
@@ -162,7 +165,8 @@
     self.script.append(
         'apply_patch_check("%s"' % (filename,) +
         "".join([', "%s"' % (i,) for i in sha1]) +
-        ') || abort("\\"%s\\" has unexpected contents.");' % (filename,))
+        ') || abort("E%d: \\"%s\\" has unexpected contents.");' % (
+            common.ErrorCode.BAD_PATCH_FILE, filename))
 
   def Verify(self, filename):
     """Check that the given file (or MTD reference) has one of the
@@ -184,8 +188,10 @@
     """Check that there's at least 'amount' space that can be made
     available on /cache."""
     self._required_cache = max(self._required_cache, amount)
-    self.script.append(('apply_patch_space(%d) || abort("Not enough free space '
-                        'on /cache to apply patches.");') % (amount,))
+    self.script.append(('apply_patch_space(%d) || abort("E%d: Not enough free '
+                        'space on /cache to apply patches.");') % (
+                            amount,
+                            common.ErrorCode.INSUFFICIENT_CACHE_SPACE))
 
   def Mount(self, mount_point, mount_options_by_format=""):
     """Mount the partition with the given mount_point.
@@ -235,8 +241,8 @@
         raise ValueError("Partition %s cannot be tuned\n" % (partition,))
     self.script.append(
         'tune2fs(' + "".join(['"%s", ' % (i,) for i in options]) +
-        '"%s") || abort("Failed to tune partition %s");' % (
-            p.device, partition))
+        '"%s") || abort("E%d: Failed to tune partition %s");' % (
+            p.device, common.ErrorCode.TUNE_PARTITION_FAILURE, partition))
 
   def FormatPartition(self, partition):
     """Format the given partition, specified by its mount point (eg,
@@ -298,7 +304,8 @@
            % (srcfile, tgtfile, tgtsha1, tgtsize)]
     for i in range(0, len(patchpairs), 2):
       cmd.append(',\0%s,\0package_extract_file("%s")' % patchpairs[i:i+2])
-    cmd.append(') ||\n    abort("Failed to apply patch to %s");' % (srcfile,))
+    cmd.append(') ||\n    abort("E%d: Failed to apply patch to %s");' % (
+        common.ErrorCode.APPLY_PATCH_FAILURE, srcfile))
     cmd = "".join(cmd)
     self.script.append(self.WordWrap(cmd))